MATLAB: How to get values on top of the bar plot

bar plotplot

I have data that I want to have shown in groups of three. How can I get the values Diff onto the bar plot? I have tried various ways but can't get it right…
``Diff = [minD1 maxD1 meanD1; minD maxD meanD; minD2 maxD2 meanD2; minD3 maxD3 meanD3; minD4 maxD4 meanD4]*10^4;figurename = categorical({'100 ul', '200 ul', '500 ul', '750 ul', '1000 ul'});name = reordercats(name,{'100 ul', '200 ul', '500 ul', '750 ul', '1000 ul'});bar(name, Diff)ylabel('Diffusion coefficent (10^-^4)')legend('min D','max D','mean D')grid on grid minor``

``% Diff = [minD1 maxD1 meanD1; minD maxD meanD; minD2 maxD2 meanD2; minD3 maxD3 meanD3; minD4 maxD4 meanD4]*10^4;Diff = rand(5, 3);name = {'100 ul', '200 ul', '500 ul', '750 ul', '1000 ul'};figure;ax = axes();b = bar(1:5, Diff);ylabel('Diffusion coefficent (10^-^4)')legend('min D','max D','mean D')grid on grid minorax.XTickLabel = name;barNames = {'a', 'b', 'c'};x_diffs = [-0.25 -.05 0.2]; % x-location of bars relative to middle bary_diff = 0.02; % height of text above the barfor i = 1:numel(b)    text(b(i).XData+x_diffs(i), b(i).YData+y_diff, barNames(i));end``